humimeter FLS - 2 m hay stack moisture and temperature probe

Moisture and temperature measured deep inside the stack

Hay stored too wet starts to work: fungi and bacteria develop in it, and the heat they give off raises the temperature of the stack. In the extreme case it ends in spontaneous combustion. That is why a stack is checked not from the outside but from within - and not once, but regularly.

The humimeter FLS has a 2 metre insertion probe, dismantled for transport, and measures the water content and the material temperature at the same time. A hot spot or a damp pocket can therefore be found early, before it turns into a problem.

humimeter FLS 2 metre insertion probe for measuring the moisture and temperature of a hay stack

When to measure

before storing - on the trailer or in the dryer, to know whether the hay is fit to be stored
right after storing - to have a point of reference
regularly during storage - at several places and at different depths

Hay with a water content below 14 % is taken to be safe in storage. Above that value the risk of the stack heating up rises, and with it the loss of forage.

Advantages

2 m insertion probe - it reaches where the problem starts
probe dismantled for transport
water content and material temperature measured at the same time
calibration accuracy of ±0.8 % against the reference material
automatic temperature compensation
logger for 10 000 measurements with a description of the measuring point and the supplier data
result in a few seconds

Technical data

Article number	13950
Measuring range	8 to 30 % water content
Display resolution	0.1 % water content
Calibration accuracy against the reference material	±0.8 %
Temperature measuring range	-20 to +120 °C, the measuring tip only
Temperature compensation	automatic
Memory	Hold function, manual logger for 10 000 measurements with a measuring point report
Dimensions	2280 × 75 × 45 mm without the cross handle
Weight	1200 g with batteries
Power supply	4 × AA 1.5 V alkaline batteries
Current consumption	60 mA with the backlight on
Menu languages	English, German, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, international

Scope of delivery

humimeter FLS meter with the 2 m probe
rubber protection cover
cross handle
batteries
case (art. no. 15428), 1220 × 180 × 70 mm, 2.80 kg with the meter

The USB interface module with the LogMemorizer software is not part of the set - it is a separate item, art. no. 12278.

Checking the readings

The manufacturer recommends comparing the readings with the oven-drying method from time to time. For a quick check in the field there is test block art. no. 12308, listed in the price list with the FL1, FL2, FLH, BLL, BL2, WLW, BLW, SLW, RM1 and BLO.

Extended accessories

Art. no. 12278 - USB interface module with LogMemorizer basic software and a USB cable to the computer
Art. no. 11909 - LogMemorizer PRO, annual licence with cloud access
Art. no. 15444 - thermal printer with a rechargeable battery, USB-C version
Art. no. 12308 - test block for checking the readings
Art. no. 14902 - replacement 1.15 m lance for the humimeter FL series
Art. no. 15147 - steel cross handle, spare part for the BLL, FL1 and FL2

FLS or FL2

The humimeter FL2 has a 600 mm probe and a pressure plate, so it measures both bales and loose material - it is an instrument for checking at harvest and at intake. The FLS has a 2 m probe and is an instrument for supervising a stack in storage: it reaches layers the FL2 does not get to. On a farm where hay is both stored and bought in, the two complement each other.